Duplicating block for typing on both sides



' g- 1957 N. l. BRIGHT 2,802,678

DUPLICATING BLOCK FOR TYPING ON BOTH SIDES Filed July 2, 1956 v! a 1 IV FIG. 2

2 4 FIGFI 2 3b FIG. 4

' 1 l4b J |20 l2b i l3b uvmvrm NELLIE LBRIGHT ATTORNEY United States Patent DUPLICATING BLOCK FOR TYPING ON BOTH SIDES Nellie I. Bright, Pasadena, Calif.

Application July 2, 1956, Serial No. 595,166

11 Claims. (Cl. 28222) This invention relates to a duplicating block of alternately superposed writing sheets, carbon paper sheets and guard sheets bound together at one edge. More particularly, it relates to a duplicating block in which both sides of the writing sheets can be typed without the restutfing of the carbon sheets after the first side of the writing sheets has been typed.

In the known bound blocks or pads, having carbon sheets between the writing sheets, in order to type on the back sides of the sheets, after the front side has been typed, the carbon sheets must be removed and restuifed in the opposite direction between the writing sheets. This restuffing operation consumes a great amount of the typists time which is very costly. Further, in restufiing, carbon papers are on many occasions put in backwards, even by the most experienced stenographers. This spoils the work and causes an additional loss of time. Another time loss is caused, when during the restuifing operation, the typists hands become soiled from the carbon and she must stop and wash them before proceeding with her work.

Before the development of the pre-stutfcdpads, special workers were employed to stuif the carbons between the writing sheets for the typists. These workers, of course, were paid at a lower rate than the typist. With the conventional pre-stuffed forms now used, carbon stuifers are no longer employed and the typist is required to stuff her own carbons for typing on the back side of the writing sheets.

When the duplicating blocks now in use are prepared as a fill-in form, in order to save typing on the reverse side because of .the time loss in restuifing carbons, frequently, the front sides are made very crowded, having a minimum, and sometimes inadequate, space for the required insertions. With the present invention, which permits typing on the back side without the restuffing of carbons, there is no need to crowd the front sides of printed forms because typing on the back sides requires no extra time consuming work.

The present invention is comprised of superposed writing sheets, having a guard sheet, a first piece of carbon paper and a second piece of carbon paper between each two successive Writing sheets. Each guard sheet is adjacent to the first of each two consecutive writing sheets, and each first piece of carbon paper, for duplicating on the front side of each second writing sheet, has its coated side in contact therewith in the usual manner. Between each guard sheet and each first carbon paper is a second piece of carbon paper having its coated side in contact with the guard sheet. Each second piece of carbon paper is for duplicating on the back side of each first writing sheet when the first piece of carbon paper and the guard sheet have been removed. The guard sheets and the first pieces of carbon paper have cut away portions along the binding edge to allow for their easy removal after the front or first side of the paper has been typed. For example, when the first side has been typed and the guard sheets and first carbon papers have been removed, the

block may be removed from the typewriter and reinserted in the opposite direction in the typewriter for typing on the second or back side of the writing pages. This operation saves a great amount of time in that no restufling is required by the typist.

When a block of writing sheets is typed on the second sides, according to the present invention which eliminates restuifing of the duplicating paper, the writing sheets always remain in perfect alignment as they are held in place by the bound edge. Aligning of the pages after restufling of the carbons, as required in the prior art, is often an exasperating and time consuming operation. Not having to work with the carbons, also, permits greater neatness in the work and avoids the usual smudges which occur when the carbon paper must be shifted from one place to another.

The present invention requires a guard sheet and a second .piece of carbon paper between each two writing sheets in addition to the single sheet of carbon paper used in duplicating blocks of the prior art. However, the cost of these two additional papers is very low and is insignificant as compared with the loss of the typists time consumedin restuffing and in the resulting problems which ensue therefrom.

While the principal use of the present invention may be in the prepared type of fill-in forms, it is also very advantageous for use by typists in any instance where they have to prepare a number of copies, using both sides of the writing pages.

A second embodiment of the present invention is provided for the situation where the first page must be an original copy on both sides. This is accomplished by having only one sheet of carbon paper between the first and second writing sheets and having two guard sheets with a piece of carbon paper therebetween under the last writing sheet. Then, when the first side of the pages has been typed, the first carbon papers and the guard sheets are removed, and the front page is removed and placed on the bottom or external carbon paper which had been between the two, previously removed, external guard sheets.

The present invention and the method of making it is intended to be practiced with any type of duplicating material which has a coating on one side, said coating being transferable to a writing sheet in contact therewith by means of pressure applied to the other side.

Therefore, an object of this invention is to provide an improved duplicating block and the method of assembling it.

A principal object of this invention is to provide a duplicating block for typing or writing on both sides of the writing pages without restuifing the carbon or duplicating papers.

Other objects of this invention will become apparent from the following description taken in connection with the accompanying drawings, in which Fig. 1 is a plan view of a duplicating block;

Fig. 2 is a side view of a duplicating block taken along the line 22 of Fig. 1;

Fig. 3 is a plan view of a piece of carbon paper used for duplicating on the front side of the writing sheet; and

Fig. 4 is a side edge View of a duplicating block in which the first page can be typed as an original on both sides.

Referring to Figs. 1-3, the duplicating pad or block is shown having a plurality of writing sheets 1, 1a, 1b, and 1c. Superposed between first writing sheet 1 and second writing sheet 1a are guard sheet 2, second or back side carbon paper 4 and first or front side carbon paper 3. Front side carbon paper 3 has its coated side in contact with the front side of writing sheet In for marking thereon and second carbon or duplicating paper" 4 has its coated side in contact with guard paper 2. Between writing sheets 1a, 1b and 1c are alike arrangements of first carbon papers 3a and 312, second carbon papers 4a and 4b, and guard sheets 2a and 2b, respectively. The guard sheets may be made of any suitable light weight and inexpensive material through which duplicating marks can be made.

The successive Writing sheets, first and second carbon papers, and guard sheets are bound together along binding edge 7 by any suitable means, such as by glue or staples. First side carbon papers 3, 3a and 3b and guard sheets 2, 2a and 2b may be of the same length and may project beyond second carbon papers 4, 4a and 4b which are shown to project beyond the writing pages. The diiferent lengths are provided for ease of removal at the different stages of the writing or typing operation.

The bottom edges, those opposite the bound edges, of the carbon papers may be made of a material having no duplicating coating to make it possible to avoid touching the coating and soiling the hands. This is illustrated in Fig. 3 where tip 32 is on a first side type of carbon or duplicating paper 3d. The back side or second duplicating papers. also may be made with a similar nonduplicating material on the edge opposite the binding edge.

As the first side carbon papers and guard sheets are removed from the block first, it is desirable that they be more easily removable than the second carbon papers and the writing sheets. This may be accomplished by having cut away portions 5, as shown on the carbon paper in Fig. 3, along the binding edge. The amount of material cut away may be considerable, leaving just enough to hold the sheets in place in the pad. It is preferred to have the guard sheets cut away along the binding edge to the same extent as the first carbon sheets so that they will come out simultaneously when the pad is pulled slightly at the binding edge with one hand and along the first carbon papers and guard sheets with the other hand at the opposite edge. In other words, the slotted cut away portions 5, shown on carbon paper 3d, along binding edge 7 could be aligned with and be of the same configuration in the guard sheets, not shown separately in a plan view. Slotted perforations 5 may be cut into the first carbon papers and guard sheets before the pads are assembled. If it is desirable, a lesser amount of cut away portions may be made in the second carbon sheets, which generally would be removed from the pad when all writing or typing is completed. That is, the second duplicating papers could be made with less perforations than the first carbon papers and guard sheets but with greater perforations than the writing sheets. This would permit the second carbon papers to be more easily removed from the pad than the writing papers. However, the invention as illustrated, shows the writing sheets and the second carbon papers to have the same amount of substantially circular perforations 6, in Fig. 1. made along the binding edge in alignment with slots 5, also shown in Fig. 1, after the block has been bound.

In operation, writing or typing may be performed on the front side of the first page 1 and it is duplicated on the front side of each succeeding pages la, 1b and 10, by means of first side carbon paper 3, 3a, and 3b, respectively. After the work has been completed on the first side, the guard sheets 2, 2a, and 2b and the first side duplicating papers 3, 3a and 312 may be torn from the pad along the line of cut away portions by holding the binding edge 7 in one hand and the opposite edge of the first carbon papers and guard sheets in the other hand. This, then, leaves only the second or back side carbon papers 4, 4a and 4b between the successive writing sheets which are now ready for writing or typing on their back side. After the back sides have been typed, the second duplicating papers may then be removed along the line of perforations 6. Similarly, the writing sheets may be removed from the pad, leaving only the binding edge intact.

Perforations 6 may be In Fig. 4 is shown another embodiment of the invention.

which may be used where the first page must have original typing on both sides thereof. This pad is assembled only slightly differently from the one shown in Fig. 2. Between the first two writing sheets 11 and 11a is a first side carbon paper 13 which is present to cause any marks made on the first page to be duplicated on the second page 11a. Between successive writing sheets 11a, 11b and 11c are guard sheets 12 and 12a, first carbon papers 13a and 13b, and second carbon papers 14 and 14a, respectively, arranged in the same manner as shown between the writ ing sheets in Fig. 2. The duplicating papers and guard sheets here function in the same manner described under the embodiment illustrated in Figs. l-3. External of the bottom sheet 11c, in Fig. 4, are two external guard sheets 12!) and 120, having a second or back side carbon paper 141) between them and having its coated side in contact with sheet 12b. This pad is bound together along binding edge 7 in the manner previously described.

In operation, after the typing has been completed on the first side, the first side carbons and the guard sheets may be removed from the pad along the binding edge, as described above. Next, the first page 11 is torn from the pad along the binding edge and placed so as to have its front side in contact with the uncoated side of external carbon paper 14b. That is, the untyped or back side of page 11 would then be facing the right side of Fig. 4 and would be on top of the pad when it is reversed for typing on the back side of the pages. At this stage of the operation, the pad has, between sheets 11, 11c, 11b and 11a, carbon papers 14b, 14a, and 14, respectively, which will serve to duplicate any markings made on the back side of page 11 on the back side of pages 11c, 11d and 11a, in that order. After completion of this phase of the operation, all writing sheets have then been typed on both sides and sheet 11 has been typed in the original on both sides. The back side carbon papers may then be removed from the pad, as described above, either separately or with the writing sheets, except for sheet 11 which is already loose.

In assembling the pad or block, the guard sheets and duplicating papers may either be inserted between the writing sheets or each sheet or paper may be placed successively, one on top of the other, starting with top or bottom writing sheet. The method of assembling will depend on the equipment available of upon the preference of the individual who may be assembling by hand.

Although the invention has been described and illustrated in detail, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, the spirit and scope of this invention being limited only by the terms of the appended claims.

I claim:

1. A duplicating block for marking on both sides comprising a plurality of superposed writing sheets, guard means successively between said writing sheets, and second means between said writing sheets for duplicating on one side thereof while said guard means is in place and for duplicating on the other side thereof when said guard means is removed.

2. A duplicating block for writing on both sides comprising a plurality of superposed writing sheets, guard means successively between said writing sheets, first means between said writing sheets to permit duplication on one side of said sheets while said guard means is in place, and second means between said writing sheets to permit duplication on the other side of said sheets when said guard means and said first means are removed.

3. A duplicating block according to claim 2 in which said first means is carbon paper directed in one direction and said second means is carbon paper directed in the opposite direction.

4. A duplicating block for duplicating on both sides of paper comprising a plurality of superposed writing sheets having guard means successively therebetween, first duplicating means successively between said sheets directed to duplicate away from said guard means, and second duplicating means successively between said sheets directed in the opposite direction from said first duplicating means.

5. A duplicating block according to claim 4 in which said duplicating means are carbon paper.

6. A duplicating block for duplicating on both sides of paper comprising a plurality of superposed writing sheets; a guard sheet, a first piece of carbon paper and a second piece of carbon paper between each two successive writing sheets; each of said first pieces of carbon paper having its coated side directed toward and in contact with the second of each two successive writing sheets, each of said second pieces of carbon paper having its coated side directed toward and in contact with one side of said adjacent guard sheet, the other side of said guard sheet being contiguous with the back side of the first of each two successive writing sheets.

7. A duplicating block according to claim 6 in which said writing sheets, said guard sheets and said carbon paper are bound together and perforated on a binding edge, said first carbon paper and said guard sheets projecting beyond said writing sheets and said second carbon paper at the edge opposite said binding edge and being cut away along the line of perforations on said binding edge leaving narrow perforated connecting strips arranged at intervals apart along the perforation line, said second carbon paper projecting beyond said writing sheets at the edge opposite said binding edge.

8. A duplicating block for duplicating on both sides of the paper comprising a plurality of superposed writing sheets including a top and bottom writing sheet, a first piece of duplicating paper between said top writing sheet and the second of said writing sheets, said first duplicating paper having its coated side directed toward said second writing sheet, a guard sheet between each successive two of the remainder of said writing sheets starting with said second writing sheet, a second piece of duplicating paper between each successive two of said remainder of writing sheets having its coated side directed toward and in contact with the front side of the second of each successive two writing sheets, a third piece of duplicating paper between each successive two of said remainder of writing sheets having its coated side directed toward and in contact with one of said guard sheets, each guard sheet having its other side adjacent with the back side of the first of each successive two writing sheets, an external piece of duplicating paper exteriorly of said writing sheets and having its coated side directed toward the back side of said bottom writing sheet, a first external guard sheet exteriorly of said writing sheets between said last-mentioned back side and said external duplicating paper, and a second external guard sheet superposed on the uncoated side of said external piece of duplicating paper.

9. A duplicating block according to claim 8 in which said writing sheets, said guard sheets and said duplicating paper are bound together and perforated on a binding edge; said first and second duplicating paper and said guard sheets projecting beyond said writing sheets, said third and said external duplicating paper at the edge opposite said binding edge and being cut away along the line of perforations on said binding edge leaving narrow perforated connecting strips arranged at intervals apart along the perforation line; said third and said external duplicating paper projecting beyond said writing sheets at the edge opposite said binding edge.

10. A duplicating block for duplicating on both sides of the paper comprising at least two writing sheets, at least one guard sheet, at least one first piece of carbon paper, and at least one second piece of carbon paper, said guard sheet and said first and second piece of carbon paper disposed between said writing sheets, said guard sheet having one side adjacent and in contact with one of said writing sheets, said second piece of carbon paper having its coated side adjacent and in contact with the other side of said guard sheet, said first piece of carbon paper having its coated side adjacent and in contact with the other of said writing sheets.

11. Writing sheets for duplicating on both sides thereof, comprising at least two writing sheets, at least one guard sheet, at least one first piece of duplicating paper having one side coated with duplicating material, and at least one second piece of duplicating paper having one side coated with duplicating material, said guard sheet and said first and second piece of duplicating paper disposed between said writing sheets, said guard sheet having one side adjacent and in contact with one of said writing sheets, said second piece of duplicating paper having its coated side adjacent and in contact with the other side of said guard sheet, said first piece of duplicating paper having its coated side adjacent and in contact with the other of said writing sheets.

No references cited. 

